THEIR LED LIGHTS WON'T TURN ON!

Ugh, that is so frustrating! I have my LED lights to work, but they just won't switch on. I've looked the fixtures - they seem alright. Maybe the wall switch is {the{ problem? I haven't know what else to try! Any ideas would be much appreciated! Troubleshooting Faulty LED Lights When your LED lights start to fail, it can be a painful experience